US2687989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt production
Assignee: Standard Oil Development Co
•
Filing: 1951-11-30
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Granted: 1954-08-31
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Expires: 1971-11-30
Abstract
No abstract record available.
Inventors
- 👤 Henry S Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:19
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR PRODUCING A HOMOGENEOUS ASPHALT BLEND BY THE COMBINATION OF TWO ASPHALTS, ONE OF WHICH IS HETEROGENEOUS WHICH COMPRISES THE SOLE TREATING STEPS OF: MIXING A FIRST HETEROGENEOUS ASPHALT SELECTED FROM THE CLASS CONSISTING OF TARS DERIVED BY CRACKING ASPHALTIC CRUDE OILS AND OXIDIZED ASPHALTS, CHARACTERIZED BY A SUSCEPTIBILITY FACTOR LOWER THAN ABOUT 3.3, AND A SECOND HOMOGENEOUS ASPHALT DERIVED FROM AN ASPHALTIC CRUDE OIL BY REDUCTION, CHARACTERIZED BY A SUSCEPTIBILITY FACTOR HIGHER THAN ABOUT 3.3, SAID MIXTURE INCLUDING NOT MORE THAN ABOUT 35% OF THE SAID FIRST ASPHALT AND FORMING A HETEROGENEOUS ASPHALT COMPOSITION, AND THEREAFTER REDUCING THE SAID MIXTURE BY REMOVAL OF AT LEAST 3% OF THE MORE VOLATILE CONSTITUENTS OF THE MIXTURE, WHEREBY A FINAL HOMOGENEOUS ASPHALT COMPOSITION IS OBTAINED.
Claim 2
Dependent Claim
125 words
A PROCESS FOR PRODUCING A HOMOGENEOUS ASPHALT BLEND BY THE COMBINATION OF TWO ASPHALTS, ONE OF WHICH IS HETEROGENEOUS WHICH COMPRISES THE SOLE TREATING STEPS OF: MIXING A FIRST HETEROGENEOUS ASPHALT SELECTED FROM THE CLASS CONSISTING OF TARS DERIVED BY CRACKING ASPHALTIC CRUDE OILS AND OXIDIZED ASPHALTS, CHARACTERIZED BY A SUSCEPTIBILITY FACTOR LOWER THAN ABOUT 3.3, AND A SECOND HOMOGENEOUS ASPHALT DERIVED FROM AN ASPHALTIC CRUDE OIL BY REDUCTION, CHARACTERIZED BY A SUSCEPTIBILITY FACTOR HIGHER THAN ABOUT 3.3, SAID MIXTURE INCLUDING NOT MORE THAN ABOUT 35% OF THE SAID FIRST ASPHALT AND FORMING A HETEROGENEOUS ASPHALT COMPOSITION, AND THEREAFTER REDUCING THE SAID MIXTURE BY REMOVAL OF AT LEAST 3% OF THE MORE VOLATILE CONSTITUENTS OF THE MIXTURE, WHEREBY A FINAL HOMOGENEOUS ASPHALT COMPOSITION IS OBTAINED.
References Cited (Backward Citations)
US2220714A
Cited
US2317150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |